PVDF Coated Aluminum

PVDF paint, as the key coating of PVDF color aluminum, not only improves the durability and decorativeness of the aluminum plate, but also gives the material more excellent performance.

The color aluminum coil produced by PVDF process has bright colors and excellent performance. PVDF coated aluminum is an ideal decorative material choice for modern buildings.

What is PVDF coating?

PVDF refers to a coating with fluororesin as the main film-forming substance. Among various coatings, fluororesin coatings have particularly superior properties due to the large electronegativity of the introduced fluorine element and the strong carbon-fluorine bond energy.

Mainly include:

• Excellent anti-corrosion performance - providing a protective barrier for the substrate;
• Tough paint film - high surface hardness, impact resistance, anti-bending, and good wear resistance;
• Maintenance-free and self-cleaning - surface dust can be self-cleaned by rainwater, and has good anti-fouling properties;
• Strong adhesion - excellent adhesion on metal, plastic, cement, composite materials and other surfaces.
• High decorativeness - can achieve a high gloss of more than 80%;
• Super long weather resistance - no powdering, no fading, and a service life of up to 20 years;

After decades of rapid development, PVDF paints have been widely used in various fields of construction, chemical industry, electrical and electronic industry, machinery industry, aerospace industry, and household products, so PVDF paints have become the coating brand with the highest comprehensive performance.

What’s PVDF coated aluminum?

PVDF color-coated aluminum is an aluminum material that is coated with PVDF fluorocarbon coating and rolled with a double or triple coating process.

PVDF aluminum sheet, as a high-quality aluminum alloy material, is favored for its unique performance and wide application fields. It uses 1000, 3000, 5000 aluminum alloy as the base material, and is formed by precise CNC engraving, stamping cutting and bending technology. The surface is then treated with fluorocarbon or powder spraying to form a curtain wall decoration material with excellent weather resistance.

• Light weight, good rigidity and high strength. 3.0mm thick aluminum sheet weighs 8kg per square meter and has a tensile strength of 100-280n/mm2.
• Good weather resistance and corrosion resistance. PVDF fluorocarbon paint based on Kynar-500 and Hylur500 can last for 25 years without fading.
• Not easy to stain, easy to clean and maintain. The non-adhesiveness of the fluorine coating film makes it difficult for pollutants to adhere to the surface, and it has good cleanliness.
• Easy and quick installation and construction. The aluminum sheet is formed in the factory, and no cutting is required at the construction site. It can be fixed on the frame;
• Recyclable and reused, which is beneficial to the environment. Aluminum plates are 100% recyclable.
• Widely used in curtain wall decoration and interior decoration in airports, subways, doorheads, schools, exhibition halls, etc.

PVDF Coated aluminum specifications and production

After extensive investigation and customer inquiries, we found that the more popular PVDF color-coated aluminum on the market is the following specifications:

PVDF Coated aluminum production process

For PVDF color-coated aluminum, our factory has two production lines: roller coating and powder coating.

The roller coating production line is mainly used to produce flat plates/rolls with a thickness not exceeding 5 mm. The color coating technology is mature and the finished products are excellent.

The PVDF powder coating production line is mainly used to produce various special-shaped plates, single plates, etc., to ensure the subsequent processing and use by customers.

PVDF roller coating line

Roller coating is to apply the coating evenly on the surface of the object through a roller.

It is suitable for flat objects, especially metal coil coating, and has the characteristics of high efficiency and automation.

The roller coating process includes pickling, leveling and other procedures, and can efficiently complete the coating task through assembly line operation.

PVDF powder coating line

PVDF powder ocating is to spray the paint on the surface of the object through a spray gun. It is suitable for manual work and industrial automation production, and has a wide range of applications, including hardware, plastics, furniture, military industry and other fields.

The spraying process uses a spray gun to spray the paint evenly on the surface of the object, which is suitable for small batch production and complex products.

PVDF coated aluminum performance and related tests

During the inquiry process, we found that the common problems of PVDF color-coated aluminum include paint peeling and damage caused by heavy objects falling.

This is due to the poor composite of paint and aluminum plate. For this reason, we will conduct factory tests for customers when supplying, and the performance parameters are as follows:

• Adhesion: The grid adhesion test shows that the coating will not fall off.
• Flexibility: The coating does not fall off after the 3T bend test.
• Impact resistance: The coating does not fall off after 9J reverse impact.
• Hardness: The pencil hardness reaches or exceeds 2H.
• Resistance to organic solvents: The coating is not damaged after 100 MEK wipes.
• Scratch resistance: The scratch test under 1800g probe did not scratch the coating.
• Humidity and heat resistance: No blistering, cracking or shedding after 1000 hours of humidity and heat test, and no change in color, gloss and hardness.
• Acid and alkali resistance:
  • Acid resistance: No obvious change in 5% hydrochloric acid for 24 hours.
  • Alkali resistance: No obvious change in 5% sodium hydroxide solution for 24 hours.
• Boiling water resistance: No loss of gloss, discoloration, cracking, blistering or shedding in 100℃ boiling water for 2 hours.
• Salt spray resistance: After 1000 hours of neutral salt spray test, the blister level is less than 2S3, and there are no other obvious defects.
• Weather resistance: 2000 hours under UVA-340 ultraviolet light, the powdering level does not exceed level 1, and there are no defects such as blistering and cracking (ASTM D4214, the powdering level is not less than level 8).

The PVDF coated Aluminum Applications

Roof and exterior wall materials

PVDF roller-coated aluminum sheet is a high-quality choice for roofing and exterior wall materials due to its weather resistance and protective properties, especially suitable for projects that require long-term use and low maintenance costs.

Interior decoration

The application of colored aluminum plates in interior decoration, such as aluminum gusset plates and aluminum veneers, not only improves the aesthetics of the space, but also reduces long-term operating costs due to its easy cleaning and maintenance characteristics.

Special building structure

In special building structures such as aluminum square tubes, metal insulation integrated panels and aluminum honeycomb panels, the use of colored aluminum panels enhances the functionality and aesthetics of the building, while also improving the energy-saving effect of the building.

The Advantages of PVDF coated aluminum

• It has extraordinary stability and can maintain the stability of various properties in acidic, alkaline and severely polluted environments.
• With a durability of more than 20 years, PVDF aluminum coils can still maintain good color and gloss outdoors for 20 years.
• Excellent processing performance, PVDF aluminum sheet has high flexibility, impact resistance, and can be reprocessed.